1 files changed, 28 insertions, 0 deletions
diff --git a/21_read_rec1/test.c b/21_read_rec1/test.c
new file mode 100644
index 0000000..52fd4e4
--- /dev/null
+++ b/21_read_rec1/test.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void printDigits(int x) {
+  if (x == 0) {
+    printf("0");
+  }
+  else if (x < 0) {
+    printf("-");
+    printDigits(-x);
+  }
+  else {
+    int a = x/10;
+    int b = x %10;
+    printf("a=%d, b=%d\n",a,b);
+    if (a != 0) {
+      printDigits(a);
+    }
+    printf("%d",b);
+  }
+}
+
+
+int main(void) {
+  printDigits(297);
+  printf("\n");
+  return EXIT_SUCCESS;
+}